Parsons : Maritime Plants and Tidal Eivers. 119 



both, upward and downward : but my observations are too few to 

 found any theory upon, and I must leave the further discussion of 

 the question to another occasion. 



TABLE I. 



Date. 



Apr. 74 

 July, 74 



Oct. 



1/75 



Water taken at High 

 Tide from 



P. Ouse 



Swinefleet 

 Goole 



Sea . . . Bridlington 

 R. Humber Whitton ... 



P. Ouse 



P. Don 

 P. Aire 



.. Whitgift... 



Swinefleet 



Goole 



Booth Ferry 



Langrick... 



Newhay . . . 



Selby ... 

 PawclifFe Br. 

 New Bridge 

 Carlton 



46^ 

 49 



37 



431 



464 



49 



54 



571 



60 



65| 



52 



54 



63 



Contents. Grs. per gallon. 



ft o 

 02 



244 



t 

 30 

 88 

 148 

 47 

 45 

 27 

 18 

 12 

 28 

 69 

 7 



247 

 540 

 2483 

 790 

 297 

 122 

 123 

 15 

 15 

 17 

 15 

 30 

 20 

 15 



o 



a 

 •i-t 



o 



o 



122-5 

 280 

 1410 

 425 

 148 

 52 

 55 

 3 



175 

 1-4 

 075 

 5-5 



3 



2.2 



03 

 02 



201-8 

 461 

 2383 

 700 

 242 

 857 

 90-7 

 4-9 

 2-9 

 2-6 

 1-1 

 9 



4-9 

 37 



o . 



«a2 



87 

 19-8 

 100 

 30 

 10-5 

 37 

 3-9 

 •15 

 -07 

 •04 



-3 

 •15 



* Not weighed. 



t Trace. 



TABLE II, 



Analysis of Wakp from Bank of Piver Ouse, Goole. By E, Hunter. 



(Dried at 160 ° 0.) 



Sand, &c., insoluble in H 01. after 20' boiling ... 76*67 



Magnesia ... ... ... ... 1*41 



Lime ... ... ... ... ... 4*79 



Chlorine ... ..." ... Na. Ch 1^06 0-68 



Oxide of Iron, and Alumina (latter about f) ... 9" 17 



Phosphoric Acid (Pg Og) ... ... 0-09 



Carbonic Acid ... ... .. ... 3-00 



Sulphuric Acid (SOg) ... ... 0-40 



Organic matter (containing Nitrogen 0-168, 



Ammonia 0-204 ... ... ... 2*51 



Potash, Soda, &c., not determined ... 1*38 



100-00 



